HCK-9128: Handle indexes without name in PostgreSQL

forward_engineering/ddlProvider/ddlHelpers/indexHelper.js

@@ -94,6 +94,12 @@ const getValue = value => {
 };
 
 const createIndex = (tableName, index, dbData, isParentActivated = true) => {
+	const isNameEmpty = !index.indxName && index.ifNotExist;
+
+	if (!index.columns.length || isNameEmpty) {
+		return '';
+	}
+
 	const isUnique = index.unique && index.index_method === 'btree';
 	const name = wrapInQuotes(index.indxName);
 	const unique = isUnique ? ' UNIQUE' : '';

properties_pane/entity_level/entityLevelConfig.json

@@ -883,7 +883,29 @@ making sure that you maintain a proper JSON format.
 						"propertyName": "Name",
 						"propertyKeyword": "indxName",
 						"propertyTooltip": "Optional, if not specified an automatic name will be assigned. Index name are needed to drop indexes and appear in error messages when a constraint is violated.",
-						"propertyType": "text"
+						"propertyType": "text",
+						"dependency": {
+							"type": "not",
+							"values": [
+								{
+									"key": "ifNotExist",
+									"value": true
+								}
+							]
+						}
+					},
+					{
+						"propertyName": "Name",
+						"propertyKeyword": "indxName",
+						"propertyTooltip": "",
+						"propertyType": "text",
+						"validation": {
+							"required": true
+						},
+						"dependency": {
+							"key": "ifNotExist",
+							"value": true
+						}
 					},
 					{
 						"propertyName": "Activated",
@@ -1024,6 +1046,10 @@ making sure that you maintain a proper JSON format.
 						"dependency": {
 							"key": "index_method",
 							"value": "btree"
+						},
+						"validation": {
+							"required": true,
+							"minLength": 1
 						}
 					},
 					{
@@ -1068,6 +1094,10 @@ making sure that you maintain a proper JSON format.
 									"value": "brin"
 								}
 							]
+						},
+						"validation": {
+							"required": true,
+							"minLength": 1
 						}
 					},
 					{